1 // SPDX-License-Identifier: GPL-2.0
15  * irq_reserve_ipi() - Setup an IPI to destination cpumask
32 		return -EINVAL;  in irq_reserve_ipi()
37 		return -EINVAL;  in irq_reserve_ipi()
43 		return -EINVAL;  in irq_reserve_ipi()
48 		 * If the underlying implementation uses a single HW irq on  in irq_reserve_ipi()
49 		 * all cpus then we only need a single Linux irq number for  in irq_reserve_ipi()
74 			return -EINVAL;  in irq_reserve_ipi()
78 	virq = irq_domain_alloc_descs(-1, nr_irqs, 0, NUMA_NO_NODE, NULL);  in irq_reserve_ipi()
81 		return -ENOMEM;  in irq_reserve_ipi()
94 		cpumask_copy(data->common->affinity, dest);  in irq_reserve_ipi()
95 		data->common->ipi_offset = offset;  in irq_reserve_ipi()
102 	return -EBUSY;  in irq_reserve_ipi()
106  * irq_destroy_ipi() - unreserve an IPI that was previously allocated
123 		return -EINVAL;  in irq_destroy_ipi()
125 	domain = data->domain;  in irq_destroy_ipi()
127 		return -EINVAL;  in irq_destroy_ipi()
131 		return -EINVAL;  in irq_destroy_ipi()
140 		return -EINVAL;  in irq_destroy_ipi()
143 		irq = irq + cpumask_first(dest) - data->common->ipi_offset;  in irq_destroy_ipi()
154  * ipi_get_hwirq - Get the hwirq associated with an IPI to a CPU
178 	 * a single hardware irq for all cpus then the IPI send mechanism  in ipi_get_hwirq()
181 	if (irq_domain_is_ipi_per_cpu(data->domain))  in ipi_get_hwirq()
182 		data = irq_get_irq_data(irq + cpu - data->common->ipi_offset);  in ipi_get_hwirq()
188 static int ipi_send_verify(struct irq_chip *chip, struct irq_data *data,  in ipi_send_verify()  argument
193 	if (!chip || !data)  in ipi_send_verify()
194 		return -EINVAL;  in ipi_send_verify()
196 	if (!chip->ipi_send_single && !chip->ipi_send_mask)  in ipi_send_verify()
197 		return -EINVAL;  in ipi_send_verify()
200 		return -EINVAL;  in ipi_send_verify()
204 		return -EINVAL;  in ipi_send_verify()
208 			return -EINVAL;  in ipi_send_verify()
211 			return -EINVAL;  in ipi_send_verify()
217  * __ipi_send_single - send an IPI to a target Linux SMP CPU
230 	struct irq_chip *chip = irq_data_get_irq_chip(data);  in __ipi_send_single()  local
238 	if (WARN_ON_ONCE(ipi_send_verify(chip, data, NULL, cpu)))  in __ipi_send_single()
239 		return -EINVAL;  in __ipi_send_single()
241 	if (!chip->ipi_send_single) {  in __ipi_send_single()
242 		chip->ipi_send_mask(data, cpumask_of(cpu));  in __ipi_send_single()
247 	if (irq_domain_is_ipi_per_cpu(data->domain) &&  in __ipi_send_single()
248 	    cpu != data->common->ipi_offset) {  in __ipi_send_single()
250 		unsigned irq = data->irq + cpu - data->common->ipi_offset;  in __ipi_send_single()
254 	chip->ipi_send_single(data, cpu);  in __ipi_send_single()
259  * __ipi_send_mask - send an IPI to target Linux SMP CPU(s)
272 	struct irq_chip *chip = irq_data_get_irq_chip(data);  in __ipi_send_mask()  local
281 	if (WARN_ON_ONCE(ipi_send_verify(chip, data, dest, 0)))  in __ipi_send_mask()
282 		return -EINVAL;  in __ipi_send_mask()
284 	if (chip->ipi_send_mask) {  in __ipi_send_mask()
285 		chip->ipi_send_mask(data, dest);  in __ipi_send_mask()
289 	if (irq_domain_is_ipi_per_cpu(data->domain)) {  in __ipi_send_mask()
290 		unsigned int base = data->irq;  in __ipi_send_mask()
293 			unsigned irq = base + cpu - data->common->ipi_offset;  in __ipi_send_mask()
296 			chip->ipi_send_single(data, cpu);  in __ipi_send_mask()
300 			chip->ipi_send_single(data, cpu);  in __ipi_send_mask()
306  * ipi_send_single - Send an IPI to a single CPU
317 	struct irq_chip *chip = data ? irq_data_get_irq_chip(data) : NULL;  in ipi_send_single()  local
319 	if (WARN_ON_ONCE(ipi_send_verify(chip, data, NULL, cpu)))  in ipi_send_single()
320 		return -EINVAL;  in ipi_send_single()
327  * ipi_send_mask - Send an IPI to target CPU(s)
338 	struct irq_chip *chip = data ? irq_data_get_irq_chip(data) : NULL;  in ipi_send_mask()  local
340 	if (WARN_ON_ONCE(ipi_send_verify(chip, data, dest, 0)))  in ipi_send_mask()
341 		return -EINVAL;  in ipi_send_mask()